Relationship between leaf area index and climate factors in a <i>Quercus variabilis</i> plantation at the southern foot of Taihang Mountain from 2001 to 2019

PDF HTML阅读 XML下载 导出引用 引用提醒 2001-2019年太行山南麓栓皮栎人工林叶面积指数与气候因子的关系 DOI: 10.5846/stxb202112173576 作者: 作者单位: 作者简介: 通讯作者: 中图分类号: 基金项目: 国家重点研发计划项目（2020YFA0608101）；科技基础资源调查专项课题（2021FY100701） Relationship between leaf area index and climate factors in a Quercus variabilis plantation at the southern foot of Taihang Mountain from 2001 to 2019 Author: Affiliation: Fund Project: National Key Research Development Program China（2020YFA0608101）；Special Foundation for Science Technology Basic China 摘要 | 图/表 访问统计 参考文献 相似文献 引证文献 资源附件 文章评论 摘要:栓皮栎（Quercus variabilis）是我国天然分布最广的树种之一，太行山南麓属我国林业工程重点区域，对气候变化较敏感，研究该地区栓皮栎人工林叶面积指数（LAI）与气候因子的关系对我国林业生态工程建设、温带森林碳汇功能评估有重要意义。依托河南黄河小浪底地球关键带国家野外科学观测研究站，利用LAI实测数据对2001-2019年基于MODIS地表反射率反演的LAI产品进行校正，分析了近19年来太行山南麓的气候变化趋势，以及40年生栓皮栎-刺槐-侧柏混交人工林LAI的变化特征及其与气候因子的关系。结果表明：2001-2019年实验区气候为变暖、变湿润趋势，气温升高温变化率为0.70℃/10a，生长季增温高于非生长季，生长季和非生长季降水量分别为增加和减少趋势。近10年来气候暖湿化趋势加快，高温天气发生的频率和强度增加。实验区栓皮栎混交人工林LAI为增加趋势，近19年平均值为2.09，增长率为0.21/10a，近熟林时期LAI增长率低于中龄林时期。气温是影响LAI季节和年际变异的主导气候因子，降水量主要影响LAI的季节变异。近熟林时期高温天气超过35 d的年份LAI比上一年度减小。 Abstract:Quercus is one most widely distributed natural tree species China. The key areas forestry engineering China, which sensitive change. study on relationship (LAI) this great significance construction ecological evaluation temperate forest carbon sink function In study, 40-year-old mixed (Quercus variabilis, Robinia pseudoacacia Platycladus orientalis) was taken as research object. Firstly, we corrected MODIS LAI product by using measured data. Secondly, analyzed change trend recent 19 years. Finally, variation characteristics discussed factors. results showed that experimental warming humid 2019. rising rate temperature 0.70℃·per ten increase growing season higher than non-growing season. precipitation and-non increased decreased, respectively. 10 years, humidification has accelerated, frequency intensity high-temperature weather have increased. an increasing trend, average value years 2.09, growth 0.21/10a. near-mature period lower middle-aged period. Temperature dominant climatic factor affecting seasonal inter-annual LAI, mainly affected LAI. with high days 35 previous year